testsuite_container_traits.h (traits_base): Add has_throwing_erase trait.

2010-03-04  Paolo Carlini  <paolo.carlini@oracle.com>

	* testsuite/util/testsuite_container_traits.h (traits_base): Add
	has_throwing_erase trait.
	(traits<vector>, traits<deque>): Typedef the latter to true_type.
	* testsuite/util/exception/safety.h (generation_prohibited):
	Do not test vector::erase and deque::erase: can throw if
	either copy constructor or assignment operator of value_type
	throws.
	* testsuite/23_containers/vector/requirements/exception/
	generation_prohibited.cc: Remove xfail.
	* testsuite/23_containers/deque/requirements/exception/
	generation_prohibited.cc: Likewise.

	* include/ext/throw_allocator.h (hash<__gnu_cxx::throw_value_limit>::
	operator(), hash<__gnu_cxx::throw_value_random>::operator()): Pass
	argument by const ref.

	* testsuite/util/testsuite_container_traits.h (traits<map>,
	traits<multimap>, traits<set>, traits<multiset>,
	traits<unordered_map>, traits<unordered_multimap>,
	traits<unordered_set>, traits<unordered_multiset>): Typedef
	consistently has_erase and has_insert as true_type.

	* testsuite/util/testsuite_container_traits.h
	(traits<unordered_map>, traits<unordered_multimap>,
	traits<unordered_set>, traits<unordered_multiset>): Do not wrongly
	typedef has_size_type_constructor as true_type: the constructor
	accepting a size_type actually gets the initial number of
	buckets.

From-SVN: r157239